<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>列表</title>

  <style>
       li{
          list-style-type: none;
       }

  </style>
</head>
<body>

  <ul>
    <li>1-1</li>
    <li>1-2</li>
    <li>1-3</li>
  </ul>
</body>
</html>